/**
 * Base class for gradient
 * @class SvgGradient
 * @extends SvgElement
 */
var SvgGradient = {      
    /**
     * Add a new gradient stop value
     * @method stop 
     * @param {Number} o offset
     * @param {String} c Color
     * @return {SvgGradient}
     */
    stop: function(o, c) {
        new SvgElement("stop", this.dom, this.canvas).attr({
             'offset':o,
             'stop-color':c
        });
        return this; 
    }
};
SvgGradient = SvgElement.extend(SvgGradient);